import Vue from 'vue'
import VueRouter from 'vue-router'

// const Login = () => import('../components/Login')
// const Home = () => import('../components/Home')
// const Welcome = () => import('../components/Welcome')
// const Users = () => import('../components/user/Users')
// const Rights = () => import('../components/power/Rights')
// const Roles = () => import('../components/power/Roles')
// const Cate = () => import('../components/goods/Cate')
// const Params = () => import('../components/goods/Params')
// const Order = () => import('../components/order/Order')
// const Report = () => import('../components/report/Report')

// 路由懒加载
const Login = () => import(/* webpackChunkName: "Login_Home_Welcome" */ '../components/Login.vue')
const Home = () => import(/* webpackChunkName: "Login_Home_Welcome" */ '../components/Home.vue')
const Welcome = () => import(/* webpackChunkName: "Login_Home_Welcome" */ '../components/Welcome.vue')
const Users = () => import(/* webpackChunkName: "Users_Rights_Roles" */ '../components/user/Users.vue')
const Rights = () => import(/* webpackChunkName: "Users_Rights_Roles" */ '../components/power/Rights.vue')
const Roles = () => import(/* webpackChunkName: "Users_Rights_Roles" */ '../components/power/Roles.vue')
const Cate = () => import(/* webpackChunkName: "Cate_Params" */ '../components/goods/Cate.vue')
const Params = () => import(/* webpackChunkName: "Cate_Params" */ '../components/goods/Params.vue')
const GoodsList = () => import(/* webpackChunkName: "GoodsList_Add" */ '../components/goods/List.vue')
const Add = () => import(/* webpackChunkName: "GoodsList_Add" */ '../components/goods/Add.vue')
const Order = () => import(/* webpackChunkName: "Order_Report" */ '../components/order/Order.vue')
const Report = () => import(/* webpackChunkName: "Order_Report" */ '../components/report/Report.vue')

// 1.注入插件
Vue.use(VueRouter)

// 3.创建router实例
const router = new VueRouter({
  routes: [
    {path: '/', redirect: '/login'},
    {path: '/login', component: Login},
    {
      path: '/home',
      component: Home,
      redirect: '/Welcome',
      children: [
        {path: '/welcome', component: Welcome},
        {path: '/users', component: Users},
        {path: '/rights', component: Rights},
        {path: '/roles', component: Roles},
        {path: '/categories', component: Cate},
        {path: '/params', component: Params},
        {path: '/goods', component: GoodsList},
        {path: '/goods/add', component: Add},
        {path: '/orders', component: Order},
        {path: '/reports', component: Report}
      ]
    }

  ]
})

// 挂载路由导航守卫
// 为路由对象，添加beforeEach导航守卫
router.beforeEach((to, from, next) => {
// to: 即将要进入的目标的路由对象.
// from: 当前导航即将要离开的路由对象.
// next: 调用该方法后, 才能进入下一个钩子
  // 如果用户访问的登录页，直接放行
  if (to.path === '/login') return next()
  // 从sessionStorage中获取到保存的token值
  const tokenStr = window.sessionStorage.getItem('token')
  // 没有token,强制跳转到登录页
  if (!tokenStr) return next('/login')
  next()
})

// 4.导出router实例
export default router
